Sock



FIG. 1 is a side elevational view of a sock showing our new design;

FIG. 2 is an opposite side elevational view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

The broken lines in FIGS. 1 and 3 are for illustrative purposes only and forms no part of the claimed design. 

I claim the ornamental design for the sock, as shown and described. 